1GL Bolt: Shirland, School   

Bolt in South corner of Shirland New National School-house ; 0.80 ft. above surface [1GL, Sheffield to Birmingham, Mark No. 79] - estimated location.

Location
Grid reference: SK 3980 5880.
Landranger 119: Buxton & Matlock, Bakewell & Dove Dale.
Structure: School.
Waypoint: BT1011.

Neighbouring Bench Marks

BM	Shirland, School 246.98m to the northwest.
BM	Shirland, Methodist Church 264.01m to the southeast.
BOLT	Shirland, Church 371.62m to the southeast.
BM	Shirland, Methodist Church 771.04m to the west.
BM	Morton, Holy Cross Church 1.61km to the northeast.

The nearest fundamental bench mark is Matlock, 8.98km to the west.

First Primary Levelling, England & Wales (1840-60)
This bench mark was used during the First primary levelling, England & Wales, and was levelled with a height of 473.9810 feet [144.4694 metres] above mean sea level (Liverpool datum). It was included on the Sheffield to Birmingham levelling line. The surveyor's description was Bolt in South corner of Shirland New National School-house ; 0.80 ft. above surface.